Pipe joint



IH. DOLLMAN Dec. 18 y, 1923.

Filed June 1. 1922 atrae.

' HUBEn'rqnoLiMA-N, 0F BIRMINGHAM, ENGLAND.

PIPE JOINT.

Aplplillalioll med il'une 1, 1922. Serial No. 565,235.

To all whomz't may concern.'

Be it known that l, HUBERT,D0LLMAN, a Subj ect of the King of Great Britain reslding at 19 AndertonPark Road, Moseley,

s Birmingham, in the county of Warwick, England, have invented certain new and useful Improvements in Pipe Joints; and l do hereby declare the following to be a full,

clear, and exact description ofthe same.

This invention relates to means for coupling together pipes and refers to that class of such employing non-metallic packing disposed between the ends of a pair of pipes and spigot and socket members thereon, said packing being contained and compressed in the socket member by the spigot member which is slidable therein. This invention has for its object to provide a generally im proved construction. v

In a joint according to this invention the packing is adapted to be compressed by inclined surfaces on the. socket and spigot members when the latter isidrawn into the former, and forced inwardly between the ends of the pipes -which, or parts of which, -project'beyond the adjacent surfaces of said members.

ln joints somwhat similar-to the above but in which abutting members are employed instead of slidably engaging spigot and socket members a packing` 'of circu ar section has been vheld or compressed in a .substantially lcircular space `formed by rounded 'grooves in the meeting faces, of the abutting members and bevelled edges on the ends of the pipes, and it has been proposed 'to provide one of said members around.; its periphery with longitudinally' VVprojecting spaced tongues adapted to engage in corre- 4 `sponding spaces between tongues projecting longitudinally around the periphery ofthe other member. l

, Further,.accord1ng to this invention, .the socket member may be provided with radially disposed or other holes or slits for the pipes. Each coupling member is provided The other coupling member 5 is formed at The coupling members may be drawn together by bolts or their equivalents.

Referring to the drawings AFigure 1 is a longitudinal sectional View of vone form of joint according to this invention.

Figure 2 is a similar View of another form.

In the construction illustrated at Figure 1 which shows a joint suitable for comparatively large pipes, the ends of the pipes 1 are screw threaded at 2 upon their exteriors and the end faces are bevelled at 3 to a suitable angle or curvature so that if the two pipes are placed end to end they will make contact at edges formed by the inter-4 nal diameter, their external surfaces being spaced apart by reason of the bevelling.

The two coupling members 4-5 are made separately and screwed on to the ends of the with holes 6 or other means for the accommodation of longitudinal securing members such as 'bolts 7 which are secured by means of nuts 8.

One coupling memberl is provided upon lone face with a socket like portion 10 formed by an annular flange 11. The inner end of this socket like portion is bevelled or made .concave to a suitable angle or curvature its inner eriphery upon one face with a spigot. T is spigot may be formed by an -annulariange 14C, the outer end of which is bevelled or formed toa suitable concavity 15 a5 Thebevelling or concaving of portions of the two coupling members in each case is in the opposite direction to the bevellin 'or concavin of the end of the pipe to w ich the coup ing member is applied.

The spigot of the one coupling member is ada ted to slide within the socketprovided on t e other coupling member. y

A acking 16 of suitable non-metallic material) is inserted in the cavity formed between the ends of the pipes and the ends of the socket and spigot members and the enterior of the socket member. `This packing 1 is preferably in the form of a ring of re-v silient or compressible material, and when .i pipes 20-21 are expanded into tapered form the coupling members are drawn together the packing is compressed within this cavity and serves to prevent the iuid within the pipes from obtaining accessV to the screw threads upon the exterior of the pipes.' It will be appreciated that as the joint is tightened up the packing is compressed by the inclined surfaces 12 forcing it downwardly against and between the projecting ends 15 of the pipes 1. l

For holdin a ring of packing material in position lw ilst the joint is being made the annular ange 11 forming the socket member may be provided with a number of spaced radial or.. other `openings 18 through which wooden pegs or flexible members (not shown) may be passed, which pe s or members engage with the ring itinV position.-

My invention is also applicable as illustrated in Fi e 2 to pipes wherein the couplingmem rs instead of being screwed upon the exterior of the ends of the pipes are elther secured thereon by brazing or other means or are simply placed thereon. In such a construction the -adjacent ends of the at 22 and their endsv are preferabl enlarged or beaded or thickened at 23. Vith such an arrangement the interior surfaces of the Icoupling members 24-25 are shaped at 26 to suit the exterior. surfaces of the 4e-nds of thepipes and the coupling members are provided with a spigot part 27 and socket part 28 as hereinbefore described, the ends of which parts are bevelled at 29 as already described.

In such an .arrangement the coupling members may either be drawn together by bolts or their equivalents, or a coupling nut be employed. this case the packing 30 is compressed against the ends of the pipes by the inclined surfaces ofthe spigot and socket portions and thus serves, toprevent fluid within the pipes from escaping'into the space between the exterior of the pipes and the interior of the. couplingmembers.

Again, in thls construction as in that il.- lustrated `in Figure'l, openings 31 may be provided in the socket member thro h which suitable holding members mayue passed to retain the ring of packing material 1n osition.

he cross section of the packing of joint- -ing material may be selected in accordance with' the needs of the joint. I may, for instance, use a ring of jointing material which is'circular in cross sectlon, or the ring may be rectangular in cross section or it may be shaped to suit the cross section of the into which it is to -be placed@ In all constructions it will be observed that the ackingof jointin material covers the who e area of the en of the spigot cavity of packing to hold and socket and also the vwhole area of the Aends of the pipes.

W'hat I claim then is 1. A pipe joint comprising two pipes having inclined ends,- two flanged coupling members, one adjustably mounted on the end of each of said pipes, non-metallic packs temporarily securing this packing in p'osi' tion,- saidsocket having an inclined end face, an annular projection on the other coupling member constituting a spigot projecting axially from the endof the pi con which this coupling member is mounted adapted to slide within said socket portion, said spigot having an inclined end face, and means for drawing and securing said coupling members together while the packing is secured inv position.

2. Av pipe joint comprising two pipes having inclined ends, two a ed coupling .members, one adjustably mounted on the -end of each of said pipes, non-metallic packing disposed between said coupling members, an annular projection on one of said coupling members'extending axially from the face of its flange and beyond the end ofthe pipev on which said coupling member is mounted and constituting a socket, this rojection having holes communicating wit .the interior of the socket for the purpose of temporarily securing the packln in position, .said socket having an incliner? end face, an annular projection on the other coupling member constituting a spigot yprojectin axially from the end of the pipe on whie this coupling member is mounted and adapted to slide within said socket portion, said spigot having an inclined end face, and means for drawing and securin said coupling mem( ers together, where y the packing is hel between theinclined ends of the pipes and inclined faces ofthe spigot land socket 'l portions substantially as set forth. I A f v 3. A pipe joint comprising two vpipes having screw-threaded exterior ends and inclined end faces, two lianged coupling members, one adjustably mounted on the end of each of said pipes, non-metallic packing dis-t posed between said couplin members, an annular projection on one o? said coup members extending the flange and beyond the end of the pipe on which said coupling member is mounted and constituting a socket, this having holes communicatingl wit temor of the socket for the purpose rojection the inaxially from the facleucliy and lio

of telporarily securing the packing in position, said socket having an inclined end face, an annular projection on the other coupling means for drawing and securing said coupling members together whereby the 10 packing is held between the inclined ends member constituting a spigot projecting of the pipes andinclined faces of the spigot 5 axially from the end of the pipe on which and socket portions substantially as set this coupling member is mounted and forth. adapted to slide Within said socket portion, In Witness 'whereof I affix my signature. said spigot having an inclined end face, and HUBERT DOLLMAN. 

